She had fur all over her head and barked instead of speaking. Her Healer Miriam Strout informed that her son would visit her Christmas night. It is possible that she remained at St Mungo's for the rest of her life. Her exact ailment was unknown, but it was noted to be a similar effect to consuming Polyjuice Potion prepared with animal DNA.
Behind the scenes
- Given the description on Pottermore presents what happens if an Animagus transformation fails, it seems likely that this is what happened to Agnes, with her attempted Animagus form most likely being a dog.
Agnes is a female given name, which derives from the Greek word hagnē, meaning "pure", "holy" or "lamb".
Notes and references